Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.

A．into; from

B．towards; towards

C．out of; from

D．through; through

有一名16岁男孩，2小时前3楼掉下一花盆击伤左顶部．当时有短暂意识障碍，左顶部有5cm长头皮不全裂伤。局部头皮肿胀，正侧切位颅片示左顶凹陷骨折，陷入深度0.5cm，头颅CT示左顶凹陷骨折，局部头皮肿胀。

下列哪项处理是错误的

A．清洁不全裂伤头皮

B．凹陷骨折不需处理

C．给予抗生素

D．观察有无颅内血肿形成

E．加压包扎